A structure and method for monitoring early deformation of cement concrete pavement

Abstract

The present invention relates to the field of road engineering, and in particular to a cement concrete pavement early deformation monitoring structure and method, wherein the cement concrete pavement early deformation monitoring structure comprises a pavement body, wherein the pavement body comprises a surface layer, a base layer, and a pavement cut located in the surface layer, wherein a plurality of three-axis displacement monitoring devices are evenly spaced, wherein the XY plane of the three-axis displacement monitoring device is located on the plane where the interface between the surface layer and the base layer is located, and wherein at least a portion of the three-axis displacement monitoring device is located outside the pavement body. The cement concrete pavement early deformation monitoring structure and method provided by the present invention can monitor the deformation of the cement concrete pavement in the initial stage of operation in real time, and timely monitor the structural damage of the pavement and the existing safety hazards that may be caused by excessive deformation of the pavement in the initial stage of operation, thereby playing a role in preventing accidents before they occur.

Description

Technical Field

[0001] The invention relates to the field of road engineering, and in particular to a cement concrete pavement early deformation monitoring structure and method. Background Art

[0002] With the development of highway and airport construction in my country, the construction scale is constantly expanding, and the requirements for highways (runways) are also constantly increasing. The early deformation of the road (runway) surface can often reflect the damage trend of the road (runway) surface under long-term operation, which is extremely important for the normal operation of the runway. If the early deformation of the road (runway) surface is large, it may mean that the degree of deformation of the road (runway) surface will increase seriously with the increase of operation time, which may cause bumps during driving and affect driving stability, or even pose a serious threat to the operation safety of the road (runway).

[0003] At present, the commonly used road (road) surface deformation monitoring method is mainly based on laboratory testing methods. First, the early age deformation of concrete materials is monitored in the laboratory, and the boundary conditions, interlayer contact, stress relaxation and creep are considered to simulate and calculate the early age deformation of concrete road (road) panels. Due to the influence of external factors such as construction quality and maintenance conditions, the early age deformation obtained by laboratory testing and calculation is usually quite different from the actual deformation on site, and it is impossible to achieve early warning and prompts of road (road) surface early age diseases, so it is impossible to accurately guide concrete on-site construction to reduce potential diseases caused by improper early age treatment of concrete construction. Therefore, the real-time concrete early age deformation monitoring method can effectively solve the above problems, thereby improving construction quality and reducing the cost of later disease repair. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a cement concrete pavement early deformation monitoring structure and method for solving the problems in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a cement concrete pavement early deformation monitoring structure, which includes a pavement body and a plurality of three-axis displacement monitoring devices. The pavement body includes a surface layer, a base layer and a pavement cut located in the surface layer. The XY plane of the three-axis displacement monitoring device is arranged on the plane where the surface layer and the base layer meet, and the plurality of the three-axis displacement monitoring devices are evenly spaced, and the three-axis displacement monitoring device is at least partially arranged on the outside of the pavement body.

[0006] The present invention also provides a cement concrete pavement early deformation monitoring system, the cement concrete pavement early deformation monitoring system comprising:

[0007] 1) A data acquisition module, including the cement concrete pavement early deformation monitoring structure, is used to collect cement concrete pavement early deformation data;

[0008] 2) Data processing module, used to calculate the pavement deformation according to the data collected by the data collection module according to the following formula, and judge the early operation status of the pavement:

[0009] X=a1X A +a2X B

[0010] X A =a 1x X Ax +a 1y X Ay +a 1z X Az

[0011] X B =a 2x X Bx +a 2y X By +a 2z X Bz

[0012] Where: X is the total cumulative deformation of the pavement, in μm;

[0013] X Ax ,X Ay ,X Az ——The measurement results of the three-axis displacement monitoring device at position A along the horizontal direction, longitudinal direction and vertical direction of the pavement body, in mm;

[0014] X Bx ,X By ,X Bz ——The measurement results of the three-axis displacement monitoring device at position B along the horizontal direction, longitudinal direction and vertical direction of the pavement body, respectively, in μm;

[0015] X A ——Calculation result of deformation of the triaxial displacement monitoring device at position A, in μm;

[0016] X B ——Calculation result of deformation of the triaxial displacement monitoring device at position B, in μm;

[0017] a1, a2——Cumulative deformation reduction coefficients at positions A and B, a1=0.6, a2=0.4;

[0018] a 1x ,a 1y ,a 1z——Reduction coefficient of the three-axis displacement monitoring device at position A along the horizontal, longitudinal and vertical measurement results of the pavement body, a 1x =0.1, a 1y =0.1, a 1z =0.8;

[0019] a 2x ,a 2y ,a 2z ——Reduction coefficient of the three-axis displacement monitoring device at position B along the horizontal, longitudinal and vertical measurement results of the pavement body, a 2x =0.05, a 2y =0.1, a 2z =0.85;

[0020] 3) A data display module, used to display the data collected by the data acquisition module and / or the data processed by the data processing module;

[0021] 4) Power supply module, used to supply power to the data acquisition module and the data display module.

[0022] The present invention also provides a method for monitoring early deformation of a cement concrete pavement, wherein the early deformation of the pavement is monitored by the early deformation monitoring structure of the cement concrete pavement or the early deformation monitoring system of the cement concrete pavement, and the early deformation data of the pavement is obtained based on the displacement monitoring results provided by the three-axis displacement monitoring device.

[0023] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method for monitoring early deformation of a cement concrete pavement is implemented.

[0024] The present invention also provides a device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and is characterized in that the processor is used to execute the computer program stored in the memory so that the device performs the steps of the cement concrete pavement early deformation monitoring method.

[0025] As described above, the cement concrete pavement early deformation monitoring structure and method of the present invention have the following beneficial effects: it provides a direct and feasible method for monitoring the dynamic changes of the early deformation of the pavement, and on this basis, it can study the dynamic change law of the early deformation of the pavement over time, so that the structural problems of the runway and the potential safety hazards caused by the early deformation of the pavement can be monitored in time, and the role of preventing problems before they occur can be played. In addition, the monitoring structure is arranged on the outside of the pavement as a whole, so that the monitoring of the early deformation of the pavement can be carried out without affecting the operation of the pavement, thereby greatly improving the operation efficiency of the pavement, and having a good industrialization prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a top view structural schematic diagram of the cement concrete pavement early deformation monitoring structure provided by the present invention.

[0027] Figure 2 Shown is a side structural schematic diagram of the cement concrete pavement early deformation monitoring structure provided by the present invention.

[0028] Figure 3 Shown is a cross-sectional schematic diagram of the cement concrete pavement early deformation monitoring structure provided by the present invention. Figures 1 to 3 A and B have the same meaning as A and B in Example 1, and both are layout points.

[0029] Figure 4 Shown is a schematic diagram of a monitor bracket for the cement concrete pavement early deformation monitoring structure provided by the present invention.

[0030] Component number description

[0031] 1 Tao surface ontology

[0032] 11. Surface

[0033] 12 Grassroots

[0034] 13 Surface cutting

[0035] 2 Three-axis displacement monitoring device

[0036] 21 Support

[0037] 22 Monitoring Department

[0038] 3 Power supply

[0039] X pavement body transverse

[0040] Y pavement body longitudinal

[0041] Z Vertical direction of the pavement DETAILED DESCRIPTION

[0042] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0043] See also Figures 1 to 4. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0044] After extensive practical research, the inventors of the present invention have provided a cement concrete pavement early deformation monitoring structure and method, which can timely feedback the early deformation law of the road (road) surface, and have the characteristics of easy installation, high stability of measurement data, and real-time feedback.

[0045] The first aspect of the present invention provides a cement concrete pavement early deformation monitoring structure, such as Figure 1 to Figure 4 As shown, the cement concrete pavement early deformation monitoring structure includes a pavement body 1 and a plurality of three-axis displacement monitoring devices 2, the pavement body 1 includes a surface layer 11, a base layer 12 and a pavement cut 13 located in the surface layer 11, the XY plane of the three-axis displacement monitoring device 2 is arranged on the plane where the surface layer and the base layer meet, and the plurality of the three-axis displacement monitoring devices 2 are evenly spaced, and at least part of the three-axis displacement monitoring device 2 is arranged on the outside of the pavement body 1.

[0046] In the cement concrete pavement early deformation monitoring structure provided by the present invention, the pavement body 1 can be various cement concrete pavements in the art, for example, an airport pavement, a highway pavement, and the like.

[0047] In one embodiment, the pavement body 1 generally includes, from top to bottom, a surface layer 11 , a base layer 12 , and a pavement cut 13 located on the surface layer 11 .

[0048] In the pavement body 1, the surface layer 11 generally functions to directly bear the effects of vehicle load and external environment and to provide a comfortable and safe driving surface for vehicles.

[0049] The material of the surface layer 11 can generally be plain concrete, prestressed concrete, steel fiber concrete, etc.

[0050] The thickness of the surface layer 11 is 20 to 40 cm. The thickness of the surface layer 11 can be, for example, 20 to 25 cm, 25 to 30 cm, 30 to 35 cm, 30 to 31 cm, 31 to 32 cm, 32 to 33 cm, 33 to 34 cm or 34 to 35 cm.

[0051] In the pavement body 1, the base layer 2 generally serves to receive the vertical force diffused from the surface layer, and further diffuse and transfer it to the underlying structural layer.

[0052] The material of the base layer 2 can generally be rolled concrete, inorganic binder stabilized material, crushed (gravel) stone mixture, etc.

[0053] The thickness of the base layer 2 may be 20 to 40 cm. The thickness of the base layer 2 may be, for example, 20 to 25 cm, 25 to 30 cm, 30 to 35 cm, 30 to 31 cm, 31 to 32 cm, 32 to 33 cm, 33 to 34 cm, or 34 to 35 cm.

[0054] Generally speaking, the pavement slit 13 is vertically downwardly arranged (ie, opened downwardly in the direction of gravity). The pavement slit 13 may be opened to a depth of 4-6 cm, 4-4.5 cm, 4.5-5 cm, 5-5.5 cm or 5.5-6 cm.

[0055] The pavement slit 13 usually extends along the surface of the surface layer 11, and its extension direction usually matches the extension direction of the pavement body 1. For example, the angle between the extension direction of the pavement slit 13 and the extension direction of the pavement body 1 can be 85° to 90°, 85° to 86°, 86° to 87°, 87° to 88°, 88° to 89° or 89° to 90°. That is, the angle between the surface formed by the pavement slit 13 extending downward and the longitudinal direction of the pavement body 1 is 85° to 90°.

[0056] In one embodiment, a plurality of triaxial displacement monitoring devices 2 are provided below at least part of the pavement slit 13, that is, the cement concrete pavement early deformation monitoring structure is provided with at least a slit monitoring device, and the slit monitoring device is provided close to a pavement slit 13. There is usually a certain distance between the triaxial displacement monitoring device 2 and the vertical plane corresponding to the pavement slit 13. That is, the triaxial displacement monitoring device 2 is not located directly below the pavement slit 13, but cooperates with the vertical plane corresponding to the pavement slit 13 (that is, the plane formed by the pavement slit extending in the direction of gravity), and has a suitable distance from the vertical plane corresponding to the pavement slit 13. For example, the distance between the triaxial displacement monitoring device 2 and the vertical plane corresponding to the pavement slit 13 can be 5-10 cm, 5-6 cm, 6-7 cm, 7-8 cm, 8-9 cm, or 9-10 cm.

[0057] The triaxial displacement monitoring device is usually located at the junction of the surface layer and the base layer, and on one side of the surface layer.

[0058] The triaxial displacement monitoring devices are usually evenly distributed at the junction of the surface layer and the base layer, so that the early deformation law of the pavement can be accurately fed back as a whole.

[0059] In one embodiment, a three-axis displacement monitoring device 2 is provided below at least part of the pavement slit 13 and in the middle of the pavement body 1. The three-axis displacement monitoring device is provided with more than two three-axis displacement monitoring devices, which may include a central monitoring device distributed on the center line of the pavement body and a slit monitoring device distributed below the pavement body slit. The central monitoring device is located near the center line perpendicular to the vehicle's forward direction (i.e., parallel to the center line of the slit). The central monitoring device is located at a distance of ±5 cm from the middle position of two adjacent pavement slits 13. In one embodiment, the spacing d between the central monitoring device and the center line perpendicular to the vehicle's forward direction is ≤10 cm. For another example, the three-axis monitoring device usually has a suitable spacing from the side of the pavement body, and the spacing between the three-axis monitoring device and the side of the pavement body can be 10-15 m, 10-11 cm, 11-12 cm, 12-13 cm, 13-14 or 14-15 cm.

[0060] In the cement concrete pavement early deformation monitoring structure provided by the present invention, the three-axis displacement monitoring device at the cut is usually located on the side close to the pavement cut facing the vehicle's travel direction (i.e., forward direction). This can accurately capture the impact of the vehicle on the pavement deformation when it passes through the cut and contacts the next plate.

[0061] Generally speaking, the three-axis displacement monitoring device includes a monitoring part 22 and a supporting part 21. The supporting part 21 can mainly be a bracket or other parts of the monitoring device. The supporting part 21 can mainly be located in the roadbed outside the pavement. The supporting part 21 is set in the roadbed mainly to facilitate the installation of the monitoring device bracket. The monitoring part 22 is the main part of the three-axis monitoring device (i.e., the part actually used to monitor the displacement change of the pavement monitoring point). The height of the fixed end of the monitoring part 22 can mainly be located at the surface layer. The fixed end of the monitoring part 22 is set in the surface layer mainly because the displacement monitoring device is more sensitive to the deformation of the pavement at the surface layer. The three-axis displacement monitoring device includes three mutually perpendicular displacement meters, namely, a lateral displacement meter, a longitudinal displacement meter and a vertical displacement meter, wherein the lateral displacement meter and the longitudinal displacement meter form the XY plane of the three-axis displacement monitoring device 2, and the directions of the three displacement meters are respectively set along the cutting direction (i.e., the lateral direction of the pavement body 1), horizontally parallel to the pavement extension direction (i.e., the longitudinal direction of the pavement body 1), and perpendicular to the pavement plane direction (i.e., the vertical direction of the pavement body 1). The support part 21 is arranged outside the pavement body 1, and the monitoring part 22 is at least partially arranged inside the surface layer 11. The distance between the support part 21 and the pavement body 1 is 10-15 cm.

[0062] In the cement concrete pavement early deformation monitoring structure provided by the present invention, the three-axis displacement monitoring device 2 is mainly used to collect the deformation of the cement concrete pavement in the initial stage of pouring. Suitable instruments that can be used as a three-axis displacement monitoring device should be known to those skilled in the art, for example, it can be a KTL type LVDT displacement sensor. For another example, the three-axis displacement monitoring device is usually connected to an external device (for example, a DAM-3158 data acquisition module, a computer, a 24V regulated power supply, etc.) to collect the data collected.

[0063] The monitoring process of the cement concrete pavement early deformation monitoring structure of the present invention is as follows: the three-axis displacement monitoring device 2 is buried in a proper position outside the pavement (e.g., concrete road (road) surface) in a specific manner, and the fixed end of the monitoring part 22 extends horizontally from the outside of the pavement body into the inside of the pavement body, and the extension direction of the fixed end of the monitoring part 22 is parallel to the direction of the slit. Data is collected through the three-axis displacement monitoring device 2, and the collected data can be transmitted to a computer terminal. After further analysis and processing of the data, the dynamic change law of the displacement of the early monitoring point of the pavement operation can be obtained, thereby obtaining the early deformation of the pavement.

[0064] The second aspect of the present invention provides a method for constructing the cement concrete pavement early deformation monitoring structure provided by the first aspect of the present invention. On the premise of knowing the above-mentioned cement concrete pavement early deformation monitoring structure, a suitable method for constructing the above-mentioned monitoring structure should be known to those skilled in the art. For example, a three-axis displacement monitoring device can be set at the junction of the surface layer and the base layer of the pavement, the lower half is pre-buried and fixed in the roadbed outside the pavement, the upper half is located at the height of the surface layer, and the fixed end extends horizontally into the surface layer during the construction of the surface layer.

[0065] A third aspect of the present invention provides a cement concrete pavement early deformation monitoring system, the cement concrete pavement early deformation monitoring system comprising:

[0066] 1) A data acquisition module, including the cement concrete pavement early deformation monitoring structure, is used to collect cement concrete pavement early deformation data;

[0067] 2) Data processing module, used to calculate the pavement deformation according to the data collected by the data collection module according to the following formula, and judge the early operation status of the pavement:

[0068] X=a1X A +a2X B

[0069] X A =a 1x X Ax +a 1yX Ay +a 1z X Az

[0070] X B =a 2x X Bx +a 2y X By +a 2z X Bz

[0071] Where: X is the total cumulative deformation of the pavement, in μm;

[0072] X Ax , X Ay , X Az ——The measurement results of the three-axis displacement monitoring device at position A along the horizontal direction, longitudinal direction and vertical direction of the pavement body, in mm;

[0073] X Bx , X By , X Bz ——The measurement results of the three-axis displacement monitoring device at position B along the horizontal direction, longitudinal direction and vertical direction of the pavement body, respectively, in μm;

[0074] X A ——Calculation result of deformation of the triaxial displacement monitoring device at position A, in μm;

[0075] X B ——Calculation result of deformation of the triaxial displacement monitoring device at position B, in μm;

[0076] a1, a2——Cumulative deformation reduction coefficients at positions A and B, a1=0.6, a2=0.4;

[0077] a 1x , a 1y , a 1z ——Reduction coefficient of the three-axis displacement monitoring device at position A along the horizontal, longitudinal and vertical measurement results of the pavement body, a 1x =0.1, a 1y =0.1, a 1z =0.8;

[0078] a 2x , a 2y , a 2z ——Reduction coefficient of the three-axis displacement monitoring device at position B along the horizontal, longitudinal and vertical measurement results of the pavement body, a 2x =0.05, a 2y =0.1, a 2z =0.85;

[0079] 3) A data display module, used to display the data collected by the data acquisition module and / or the data processed by the data processing module;

[0080] 4) Power supply module, used to supply power to the data acquisition module and the data display module.

[0081] The data acquisition module is connected to the data display module via a USB cable.

[0082] The power supply module includes a power supply 3, such as a voltage-stabilized power supply device, and the positive and negative electrodes of the power supply are both connected to the data acquisition module.

[0083] The fourth aspect of the present invention provides a method for monitoring early deformation of a cement concrete pavement, which monitors the early deformation of the pavement through the early deformation monitoring structure of the cement concrete pavement provided by the first aspect of the present invention or the early deformation monitoring system of the cement concrete pavement provided by the third aspect, including: obtaining early deformation data of the pavement based on the displacement monitoring results of the monitoring points provided by the three-axis displacement monitoring device.

[0084] The cement concrete pavement early deformation monitoring method specifically comprises:

[0085] S1) Provide the total cumulative deformation X of the pavement in μm according to the following formula:

[0086] X=a1X A +a2X B

[0087] X A =a 1x X Ax +a 1y X Ay +a 1z X Az

[0088] X B =a 2x X Bx +a 2y X By +a 2z X Bz

[0089] Where: X is the total cumulative deformation of the pavement, in μm;

[0090] X Ax , X Ay , X Az ——The measurement results of the three-axis displacement monitoring device at position A along the horizontal direction, longitudinal direction and vertical direction of the pavement body, in mm;

[0091] XBx ,X By ,X Bz ——The measurement results of the three-axis displacement monitoring device at position B along the horizontal direction, longitudinal direction and vertical direction of the pavement body, respectively, in μm;

[0092] X A ——Calculation result of deformation of the triaxial displacement monitoring device at position A, in μm;

[0093] X B ——Calculation result of deformation of the triaxial displacement monitoring device at position B, in μm;

[0094] a1, a2——Cumulative deformation reduction coefficients at positions A and B, a1=0.6, a2=0.4;

[0095] a 1x ,a 1y ,a 1z ——Reduction coefficient of the three-axis displacement monitoring device at position A along the horizontal, longitudinal and vertical measurement results of the pavement body, a 1x =0.1, a 1y =0.1, a 1z =0.8;

[0096] a 2x ,a 2y ,a 2z ——Reduction coefficient of the three-axis displacement monitoring device at position B along the horizontal, longitudinal and vertical measurement results of the pavement body, a 2x =0.05, a 2y =0.1, a 2z =0.85;

[0097] S2) judging the early operation status of the pavement according to the total accumulated pavement deformation X obtained in S1).

[0098] In the above formula, X Ax , X Ay , X Az , X Bx , X By , X Bz The three-axis displacement monitoring device provides the three-dimensional displacement monitoring results of the monitoring point. Through the displacement monitoring results, the deformation calculation results X of the three-axis displacement monitoring device at the required positions A and B can be further calculated. A , X B .

[0099] The cement concrete pavement early deformation monitoring method provided by the present invention may further include: calculating the deformation amount X of the three-axis displacement monitoring device at positions A and B according to the calculation result X of the deformation amount of the three-axis displacement monitoring device at positions A and B.A , X B , the total cumulative deformation of the road surface provided is X, where X is x A 、x B In the actual monitoring process, the three-axis displacement monitoring device will collect the displacement changes of each monitoring point during the entire test cycle. After calculation, the overall deformation calculation results of each monitoring point can be obtained, and the total cumulative deformation X of the road surface can be further obtained.

[0100] In the early deformation monitoring method S2) of cement concrete pavement provided by the present invention, the early operation state of the pavement (or the early deformation result of the pavement) can be judged by the following method: when the total cumulative deformation X of the pavement is lower, the early deformation degree of the pavement is lower, and the pavement damage degree is smaller; when the total cumulative deformation X of the pavement is higher, the early deformation degree of the pavement is higher, and the pavement damage degree is greater. For example, when the detection time is 60 minutes, when X<100μm, the pavement early condition is considered to be excellent; when 100μm≤X<110μm, the pavement early condition is considered to be good; when 110μm≤X<125μm, the pavement early condition is considered to be average; when 125μm≤X<150μm, the pavement early condition is considered to be poor; when X≥150μm, the pavement early condition is considered to be extremely poor.

[0101] A fifth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the cement concrete pavement early deformation monitoring method provided in the third aspect of the present invention.

[0102] The sixth aspect of the present invention provides a device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the device performs the steps of the cement concrete pavement early deformation monitoring method provided in the fourth aspect of the present invention.

[0103] Embodiment 1:

[0104] According to the construction drawing of the concrete road (road) surface layer plate, mark the positions corresponding to the cut seams and the middle of the surface layer plate on the base. The layout points A and B are marked on the outside of the road near the road surface cut seam and between the two adjacent road surface cut seams. The distance between B and the cut seam is 5 cm. A1, A2, A3, B1, B2, and B3 are marked on the outside of the road at the location of A and B, 10 to 15 cm away from the road body, as the preset holes of the steel column for the installation position of the triaxial deformation monitoring device.

[0105] Inorganic binder stabilized materials are used as the base material of the concrete road (road) surface, with a construction thickness of 20cm. After the construction and maintenance of the concrete road (road) surface base is completed, the steel column hole positions are arranged according to the pre-set three-axis deformation monitoring device installation position. A drilling machine is used to drill holes at positions A1, A2, A3, B1, B2, and B3 and install steel columns. Plain cement slurry is used to reinforce the area around the steel columns.

[0106] At positions A and B, three-axis displacement monitoring devices (three KTL LVDT displacement sensors) are fixed on the steel columns. During installation, the directions of the three displacement monitoring devices are consistent with the preset directions to ensure the authenticity and reliability of the three-axis data. After that, ordinary concrete pavement is used as the pouring form of the concrete road (road) surface layer, with a construction thickness of 30cm, a slit width of 6mm, and a depth of 5cm.

[0107] The three-axis displacement monitoring device is connected to the data acquisition module and the voltage-stabilized power supply. The data acquisition module is connected to the computer via a USB data cable, and the power supply is connected to the data acquisition module for power supply. The computer stores the transmitted data, and the power supply is powered by a solar energy system to achieve all-weather automatic data acquisition.

[0108] From the time the test section was cast, early deformation monitoring was performed on the test section, and the changes in pavement deformation at each monitoring point in the test section were recorded throughout the entire process, which was used to guide early maintenance of concrete. The monitoring results and processing of the triaxial displacement monitoring device are shown in Table 1.

[0109] Table 1 Monitoring results of the three-axis displacement monitoring device

[0110]

[0111] The data acquired by the three-axis displacement monitoring device is processed and analyzed using the analysis software in the data processing module, thereby obtaining the early deformation data of the concrete road (road) surface.

[0112] The data processing process is as follows: Substitute the data collected by the data acquisition module at different time points into the following formula to calculate

[0113] X=a1X A +a2X B

[0114] X A =a 1x X Ax +a 1y X Ay +a 1z X Az

[0115] X B =a2x X Bx +a 2y X By +a 2z X Bz

[0116] Where: X——total cumulative deformation of the road (track) surface (μm);

[0117] X Ax , X Ay , X Az ——Measurement results of the three-axis displacement monitoring device at position A along the horizontal direction, longitudinal direction and vertical direction of the pavement body (mm);

[0118] X Bx , X By , X Bz ——Measurement results of the three-axis displacement monitoring device at position B along the transverse direction, longitudinal direction and vertical direction of the pavement body (μm);

[0119] X A ——Calculation result of deformation of the triaxial displacement monitoring device at position A (μm);

[0120] X B ——Calculation result of deformation of the triaxial displacement monitoring device at position B (μm);

[0121] a1, a2——Cumulative deformation reduction coefficients at positions A and B, a1=0.6, a2=0.4;

[0122] a 1x , a 1y , a 1z ——Reduction coefficient of the three-axis displacement monitoring device at position A along the horizontal, longitudinal and vertical measurement results of the pavement body, a 1x =0.1, a 1y =0.1, a 1z =0.8;

[0123] a 2x , a 2y , a 2z ——Reduction coefficient of the measurement results of the three-axis displacement monitoring device at position B along the direction of the road, along the direction of the cut, and in the vertical direction, a 2x =0.05, a 2y =0.1, a 2z =0.85;

[0124] The obtained results are used to evaluate the early deformation degree of the road (road) surface according to the following standards (Table 2).

[0125] Table 2 Evaluation criteria for early deformation of road (road) surface

[0126]

[0127] Note: For measurement results without the above standard time, the data of the closest monitoring time point shall be selected according to the principle of proximity.

[0128] The evaluation results are shown in Table 3.

[0129] Table 3 Monitoring results of the three-axis displacement detection device

[0130]

[0131]

[0132] The above test results show that this method can effectively realize real-time monitoring of early pavement deformation and has practical significance.

[0133] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0134] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A cement concrete pavement early deformation monitoring structure, characterized in that: The cement concrete pavement early deformation monitoring structure comprises a pavement body (1) and a plurality of three-axis displacement monitoring devices (2); the pavement body (1) comprises a surface layer (11), a base layer (12) and a pavement cut (13) located on the surface layer (11); the XY plane of the three-axis displacement monitoring device (2) is arranged on a plane where the interface between the surface layer (11) and the base layer (12) is located; the plurality of three-axis displacement monitoring devices (2) are evenly spaced; at least part of the three-axis displacement monitoring device (2) is arranged on the outside of the pavement body (1); the distance between the three-axis displacement monitoring device (2) and the side surface of the pavement body (1) is 10 to 15 m; The three-axis displacement monitoring device (2) comprises a central monitoring device distributed on the center line of the pavement body, the central monitoring device is arranged at a distance of ±5 cm from the middle position of two adjacent pavement slits (13), at least one of the three-axis displacement monitoring devices (2) is arranged close to the pavement slit (13) as a slit monitoring device, the three-axis displacement monitoring device (2) at the pavement slit (13) is located on a side close to the pavement slit (13) facing the driving direction of the vehicle, the distance between the three-axis displacement monitoring device (2) at the pavement slit (13) and the vertical plane corresponding to the pavement slit (13) is 5 to 10 cm, and the cement concrete pavement is an airport pavement.

2. The cement concrete pavement early deformation monitoring structure according to claim 1 is characterized in that: The three-axis displacement monitoring device (2) comprises a supporting portion (21) and a monitoring portion (22); the monitoring portion (22) comprises a lateral displacement meter, a longitudinal displacement meter and a vertical displacement meter; the directions of the three displacement meters are respectively arranged along the lateral, longitudinal and vertical directions of the pavement body (1); the lateral displacement meter and the longitudinal displacement meter form an XY plane of the three-axis displacement monitoring device (2).

3. The cement concrete pavement early deformation monitoring structure according to claim 2 is characterized in that: The support portion (21) is arranged on the outside of the pavement body (1); and the monitoring portion (22) is at least partially arranged inside the surface layer (11).

4. The cement concrete pavement early deformation monitoring structure according to claim 2 is characterized in that: The distance between the support portion (21) and the pavement body (1) is 10-15 cm.

5. The cement concrete pavement early deformation monitoring structure according to claim 1 is characterized in that: The three-axis displacement monitoring devices (2) are provided with two, one being provided at a position ±5 cm from the middle of two adjacent road surface cuts (13) as a central monitoring device, and the other being provided close to the road surface cuts (13) as a cut monitoring device.

6. The cement concrete pavement early deformation monitoring structure according to claim 1 is characterized in that: Also includes one or more of the following characteristics: 1) The thickness of the surface layer (11) is 20 to 40 cm; 2) The thickness of the base layer (12) is 20 to 40 cm; 3) The pavement slit (13) is arranged vertically downward, and the angle between the surface formed by the pavement slit (13) extending downward and the extension direction of the pavement body (1) is 85° to 90°.

7. A cement concrete pavement early deformation monitoring system, characterized in that: The cement concrete pavement early deformation monitoring system comprises: 1) A data acquisition module, comprising the cement concrete pavement early deformation monitoring structure as claimed in any one of claims 1 to 6, for collecting cement concrete pavement early deformation data; 2) Data processing module, used to calculate the pavement deformation according to the data collected by the data collection module according to the following formula, and judge the early operation status of the pavement: X=a1X A +a2X B X A =a 1x X Ax +a 1y X Ay +a 1z X Az X B =a 2x X Bx +a 2y X By +a 2z X Bz Where: X is the total cumulative deformation of the pavement, in μm; X Ax ,X Ay ,X Az ——The measurement results of the three-axis displacement monitoring device at position A along the horizontal direction, longitudinal direction and vertical direction of the pavement body, in mm; X Bx ,X By ,X Bz ——The measurement results of the three-axis displacement monitoring device at position B along the horizontal direction, longitudinal direction and vertical direction of the pavement body, respectively, in μm; X A ——Calculation result of deformation of the triaxial displacement monitoring device at position A, in μm; X B ——Calculation result of deformation of the triaxial displacement monitoring device at position B, in μm; a1, a2——Cumulative deformation reduction coefficients at positions A and B, a1=0.6, a2=0.4; a 1x ,a 1y ,a 1z ——Reduction coefficient of the three-axis displacement monitoring device at position A along the horizontal, longitudinal and vertical measurement results of the pavement body, a 1x =0.1, a 1y =0.1, a 1z =0.8; a 2x ,a 2y ,a 2z ——Reduction coefficient of the three-axis displacement monitoring device at position B along the horizontal, longitudinal and vertical measurement results of the pavement body, a 2x =0.05, a 2y =0.1, a 2z =0.85; 3) A data display module, used to display the data collected by the data acquisition module and / or the data processed by the data processing module; 4) Power supply module, used to supply power to the data acquisition module and the data display module.

8. A method for monitoring early deformation of cement concrete pavement, characterized in that: The early deformation of the pavement is monitored by using the cement concrete pavement early deformation monitoring structure as described in any one of claims 1 to 6 or the cement concrete pavement early deformation monitoring system as described in claim 7, and the early deformation data of the pavement is obtained based on the displacement monitoring results provided by the three-axis displacement monitoring device (2).

9. The method for monitoring early deformation of cement concrete pavement according to claim 8, characterized in that: include: S1) Provide the total cumulative deformation X of the pavement in μm according to the following formula: X=a1X A +a2X B X A =a 1x X Ax +a 1y X Ay +a 1z X Az X B =a 2x X Bx +a 2y X By +a 2z X Bz Where: X is the total cumulative deformation of the pavement, in μm; X Ax ,X Ay ,X Az ——The measurement results of the three-axis displacement monitoring device at position A along the horizontal direction, longitudinal direction and vertical direction of the pavement body, in mm; X Bx ,X By ,X Bz ——The measurement results of the three-axis displacement monitoring device at position B along the horizontal direction, longitudinal direction and vertical direction of the pavement body, respectively, in μm; X A ——Calculation result of deformation of the triaxial displacement monitoring device at position A, in μm; X B ——Calculation result of deformation of the triaxial displacement monitoring device at position B, in μm; a1, a2——Cumulative deformation reduction coefficients at positions A and B, a1=0.6, a2=0.4; a 1x ,a 1y ,a 1z ——Reduction coefficient of the three-axis displacement monitoring device at position A along the horizontal, longitudinal and vertical measurement results of the pavement body, a 1x =0.1, a 1y =0.1, a 1z =0.8; a 2x ,a 2y ,a 2z ——Reduction coefficient of the three-axis displacement monitoring device at position B along the horizontal, longitudinal and vertical measurement results of the pavement body, a 2x =0.05, a 2y =0.1, a 2z =0.85; S2) judging the early operation status of the pavement according to the total accumulated pavement deformation X obtained in S1).

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, the cement concrete pavement early deformation monitoring method as described in claim 8 or 9 is implemented.

11. A device comprising: A processor and a memory, wherein the memory is used to store a computer program, and wherein the processor is used to execute the computer program stored in the memory so that the device performs the steps of the cement concrete pavement early deformation monitoring method as described in claim 8 or 9.

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